Machine: make self-like parameters come first

Author: RalfJung

src/librustc_mir/const_eval.rs

@@ -11,7 +11,7 @@ use rustc::hir::def::DefKind;
 use rustc::hir::def_id::DefId;
 use rustc::mir::interpret::{ConstEvalErr, ErrorHandled, ScalarMaybeUndef};
 use rustc::mir;
-use rustc::ty::{self, TyCtxt, query::TyCtxtAt};
+use rustc::ty::{self, TyCtxt};
 use rustc::ty::layout::{self, LayoutOf, VariantIdx};
 use rustc::ty::subst::Subst;
 use rustc::traits::Reveal;
@@ -398,27 +398,27 @@ impl<'mir, 'tcx> interpret::Machine<'mir, 'tcx> for CompileTimeInterpreter<'mir,
     }
 
     fn find_foreign_static(
+        _tcx: TyCtxt<'tcx>,
         _def_id: DefId,
-        _tcx: TyCtxtAt<'tcx>,
     ) -> InterpResult<'tcx, Cow<'tcx, Allocation<Self::PointerTag>>> {
         err!(ReadForeignStatic)
     }
 
     #[inline(always)]
     fn tag_allocation<'b>(
+        _memory: &Memory<'mir, 'tcx, Self>,
         _id: AllocId,
         alloc: Cow<'b, Allocation>,
         _kind: Option<MemoryKind<!>>,
-        _memory: &Memory<'mir, 'tcx, Self>,
     ) -> (Cow<'b, Allocation<Self::PointerTag>>, Self::PointerTag) {
         // We do not use a tag so we can just cheaply forward the allocation
         (alloc, ())
     }
 
     #[inline(always)]
     fn tag_static_base_pointer(
-        _id: AllocId,
         _memory: &Memory<'mir, 'tcx, Self>,
+        _id: AllocId,
     ) -> Self::PointerTag {
         ()
     }

src/librustc_mir/interpret/machine.rs

@@ -7,7 +7,7 @@ use std::hash::Hash;
 
 use rustc::hir::def_id::DefId;
 use rustc::mir;
-use rustc::ty::{self, query::TyCtxtAt};
+use rustc::ty::{self, TyCtxt};
 
 use super::{
     Allocation, AllocId, InterpResult, Scalar, AllocationExtra,
@@ -136,8 +136,8 @@ pub trait Machine<'mir, 'tcx>: Sized {
     ///
     /// This allocation will then be fed to `tag_allocation` to initialize the "extra" state.
     fn find_foreign_static(
+        tcx: TyCtxt<'tcx>,
         def_id: DefId,
-        tcx: TyCtxtAt<'tcx>,
     ) -> InterpResult<'tcx, Cow<'tcx, Allocation>>;
 
     /// Called for all binary operations on integer(-like) types when one operand is a pointer
@@ -174,10 +174,10 @@ pub trait Machine<'mir, 'tcx>: Sized {
     /// For static allocations, the tag returned must be the same as the one returned by
     /// `tag_static_base_pointer`.
     fn tag_allocation<'b>(
+        memory: &Memory<'mir, 'tcx, Self>,
         id: AllocId,
         alloc: Cow<'b, Allocation>,
         kind: Option<MemoryKind<Self::MemoryKinds>>,
-        memory: &Memory<'mir, 'tcx, Self>,
     ) -> (Cow<'b, Allocation<Self::PointerTag, Self::AllocExtra>>, Self::PointerTag);
 
     /// Return the "base" tag for the given static allocation: the one that is used for direct
@@ -186,8 +186,8 @@ pub trait Machine<'mir, 'tcx>: Sized {
     /// Be aware that requesting the `Allocation` for that `id` will lead to cycles
     /// for cyclic statics!
     fn tag_static_base_pointer(
-        id: AllocId,
         memory: &Memory<'mir, 'tcx, Self>,
+        id: AllocId,
     ) -> Self::PointerTag;
 
     /// Executes a retagging operation
@@ -210,8 +210,8 @@ pub trait Machine<'mir, 'tcx>: Sized {
     ) -> InterpResult<'tcx>;
 
     fn int_to_ptr(
-        int: u64,
         _mem: &Memory<'mir, 'tcx, Self>,
+        int: u64,
     ) -> InterpResult<'tcx, Pointer<Self::PointerTag>> {
         if int == 0 {
             err!(InvalidNullPointerUsage)
@@ -221,8 +221,8 @@ pub trait Machine<'mir, 'tcx>: Sized {
     }
 
     fn ptr_to_int(
-        _ptr: Pointer<Self::PointerTag>,
         _mem: &Memory<'mir, 'tcx, Self>,
+        _ptr: Pointer<Self::PointerTag>,
     ) -> InterpResult<'tcx, u64> {
         err!(ReadPointerAsBytes)
     }

src/librustc_mir/interpret/memory.rs

@@ -117,7 +117,7 @@ impl<'mir, 'tcx, M: Machine<'mir, 'tcx>> Memory<'mir, 'tcx, M> {
 
     #[inline]
     pub fn tag_static_base_pointer(&self, ptr: Pointer) -> Pointer<M::PointerTag> {
-        ptr.with_tag(M::tag_static_base_pointer(ptr.alloc_id, &self))
+        ptr.with_tag(M::tag_static_base_pointer(&self, ptr.alloc_id))
     }
 
     pub fn create_fn_alloc(&mut self, instance: Instance<'tcx>) -> Pointer<M::PointerTag> {
@@ -150,7 +150,7 @@ impl<'mir, 'tcx, M: Machine<'mir, 'tcx>> Memory<'mir, 'tcx, M> {
         kind: MemoryKind<M::MemoryKinds>,
     ) -> Pointer<M::PointerTag> {
         let id = self.tcx.alloc_map.lock().reserve();
-        let (alloc, tag) = M::tag_allocation(id, Cow::Owned(alloc), Some(kind), &self);
+        let (alloc, tag) = M::tag_allocation(&self, id, Cow::Owned(alloc), Some(kind));
         self.alloc_map.insert(id, (kind, alloc.into_owned()));
         Pointer::from(id).with_tag(tag)
     }
@@ -384,7 +384,7 @@ impl<'mir, 'tcx, M: Machine<'mir, 'tcx>> Memory<'mir, 'tcx, M> {
                 // We got a "lazy" static that has not been computed yet.
                 if tcx.is_foreign_item(def_id) {
                     trace!("static_alloc: foreign item {:?}", def_id);
-                    M::find_foreign_static(def_id, tcx)?
+                    M::find_foreign_static(tcx.tcx, def_id)?
                 } else {
                     trace!("static_alloc: Need to compute {:?}", def_id);
                     let instance = Instance::mono(tcx.tcx, def_id);
@@ -414,10 +414,10 @@ impl<'mir, 'tcx, M: Machine<'mir, 'tcx>> Memory<'mir, 'tcx, M> {
         // We got tcx memory. Let the machine figure out whether and how to
         // turn that into memory with the right pointer tag.
         Ok(M::tag_allocation(
+            memory,
             id, // always use the ID we got as input, not the "hidden" one.
             alloc,
             M::STATIC_KIND.map(MemoryKind::Machine),
-            memory
         ).0)
     }
 
@@ -890,7 +890,7 @@ impl<'mir, 'tcx, M: Machine<'mir, 'tcx>> Memory<'mir, 'tcx, M> {
     ) -> InterpResult<'tcx, Pointer<M::PointerTag>> {
         match scalar {
             Scalar::Ptr(ptr) => Ok(ptr),
-            _ => M::int_to_ptr(scalar.to_usize(self)?, self)
+            _ => M::int_to_ptr(&self, scalar.to_usize(self)?)
         }
     }
 
@@ -901,7 +901,7 @@ impl<'mir, 'tcx, M: Machine<'mir, 'tcx>> Memory<'mir, 'tcx, M> {
     ) -> InterpResult<'tcx, u128> {
         match scalar.to_bits_or_ptr(size, self) {
             Ok(bits) => Ok(bits),
-            Err(ptr) => Ok(M::ptr_to_int(ptr, self)? as u128)
+            Err(ptr) => Ok(M::ptr_to_int(&self, ptr)? as u128)
         }
     }
 }